Pliers



Junel 24, 1930. F. v scHwElGERT PLIERs Filed May 8, 1929 IIWENTORv VWATTORNEY Patented June Z4, 1930 PAT-ENT FFIC FREDERICK SCHWEIGERQIO`NEW' YORK, N. Y. Y

PLIERs Application filed May 8, 1929. Serial` No. 361,454.1

This invention relates to new and useful improvements in pliers.

The invention has for an object the provision of a device of the classmentioned which is of simple durable construction, de-

pendable in use and efficient in action, and which may be manufacturedand sold at a reasonable cost.

The invention proposes the use of detach- 1i, able biting pieces forplier jaws arranged to be quickly and firmly adjusted and held in placeupon a plier so as to be exchangeable on the jaws of various pliers,which is of extreme advantage in that new attachments may be engaged onpliers tol take the place of worn and damaged ones.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosureFigs. 1 to 4 inclusive are side elevational views of pliers constructedaccording to various designs and embodying the features.

of this invention.

Fig. 5 is an end elevational view of any of the pliers'shown in theprevious figures, for example looking in the direction of the arrows 5-5of Fig. 1.

Fig. 6 is a view similar to Fig. 5 but illustrating a modification.

Fig. 7 is a fragmentary side elevational view of a plier constructedaccording to another embodiment of the invention.

Fig. 8 is a vertical sectional view taken on the line 8-8 of Fig. 7.

Fig. 9 is a view similar to Fig. 7, but showing the extreme openedposition Vof the pliers, and the view being partially in section.

The reference numerals 10 indicate generally the jaws of a plier, whichjaws are pivotally connected as at 11 and provided with rear handles 12extending tothe rear of the pivot point 11. Biting pieces 13 are mountedon the inner opposite engaging yconnection the faces of the jaws 10. Forfacilitating this jaws 10 are j preferably formed with dove-tail tongues14 slidably engaging in dovetail' grooves formed inthe biting `pieces18. Rivets 15 are engaged. thruV .the biting pieces and the tongues 14forV holding the biting pieces in place.

In Figs. 2, 3y and 4, pliers `have been shown of various designs. Eachof these pliers have jaws pivotally connected and provided J with rearhandles. One of the jaws of each of the pliers is provided with a pintlerivet 16 whichy engages in an elongated slot 17 formed. inthe `other ofthe jaws. The slot 17 is provided with enlarged end portions as shown inthe drawing so as to provide a pivoting of the jaws with the rivet 16disposed in one or the other ends of the slot, the rivet'being formedlwith iiat sides permitting movement of the `jaws to one or the other of`the latter positions. This construction is customary in present .daypliers.

In Fig. 2, the plier jaws are indicated by reference numeral 1()a andthe handles by 12a. Biting pieces 13a are shown att-ached upon the jaws-by rivets 15a. In Fig. 3 thel jaws are indicated by numerals 10", thehandles by 12", the biting pieces by 13b and the rivets Nbyl". VIn Fig.4 the jaws are indicated by numerals 10C, the handles by 12C, the biting1 pieces by 13C and the rivets by 15C.

In the modified form of the device illus- '.tra-ted; in Fig. 6, thebiting pieces 18 kare `shown connected with the jaws 10 by tonguesintegral with the jaws and engaging in .grooves formed 1n the bitingpieces.

.These `tongues have necks 18 and end portions 19. In the `previousforms the tongue vand groovexconnections were of dovetail form. Y Y

Inl the modified form of the device'illustrated 4in Figs. 7'and 8, theplier jaws 1()d -ing these biting pieces against slidable disengagement.Springs V24 arel coaxially mounted upon the pivot points of the leversand urge the ends 22 into the said engaged positions. The other ends ofthe levers 2l are formed with inclined rear faces 25, and pins withenlarged heads 26 rest against the inclined faces 25 and are disposed inslots 27 formed in the jaws 10d. `When the pliers are open to the verylimit to which they may be opened the handles 12d act against the pins26 for forcing them frontwards in the slots 27 and forcing one of theends of the levers 2l inwards for forcing the other ends outwards sothat the ends 22 disengage from the apertures 23 and permit the removalof the biting pieces 13d.

In operation of the various designs shown, the pliers may be used incustomary fashion. VJhen the biting pieces become worn, damaged orbroken they may be removed and replaced by new ones. In the form oftheinvention shown in Figs. l to 6 inclusive it is necessary to remove therivets to permit a removal of the biting pieces. In the form shown inFigs. 7 and 8, the handles may be opened to an extreme position formoving the front ends 22 of the levers, which permits a disengagement ofthe biting pieces.

Ilfhile I have shown and described the preferred embodiment of myinvention, it is to be understood that I do not limit myself to theprecise constructionherein,disclosed and the right is reserved to allchanges and modilications coming within the scope of the invention asdefined in the appended claims.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent is 1. A pair of pliers,comprising pivoted jaws, handles connected with the j-aws and extendingto1 the rear of the pivot point, biting pieces with tongues engaging ingrooves formed in the jaws, and means for holding the biting pieces inplace,\comprising pivoted levers mounted in the jaws and engaging inapertures in the biting pieces, and means for disengaging the leverswhen the jaws are fully opened.

2. A pair of pliers, comprising pivoted jaws, handles connected with thejaws and extending to the rear of the pivot point, biting pieces withtongues engaging in grooves formed in the jaws, and means for holdingthe biting pieces in place, comprising pivoted levers mounted in thejaws and engaging in apertures in the biting pieces, and means fordisengaging the llevers when the jaws are fully opened, said lattermeans including pins engageable by the handles.

3. A pair of pliers, comprising pivoted jaws, handles connected withlthe jaws and extending to the rear of the pivot point, biting pieceswith tongues engaging in grooves formed in the jaws, and lmeans forholding the biting pieces in place, comprising pivoted levers mounted inthe jaws and engag- FREDERICK SCHVVEIGERT.

